3KP220CA-B Equivalent & Substitute Parts

Part Overview

The 3KP220CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage protection applications. This component features a 220V reverse standoff voltage with a maximum clamping voltage of 371.1V and peak pulse current handling of 8.1A. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and maintenance applications.

Substiute Parts

3KP220CA-B

Littelfuse Inc.In Stock: 10943KP220CA-B Datasheet

Current PartRFQ

5KP220CA-B

Littelfuse Inc.In Stock: 9105KP220CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP220CA-B is determined by the following critical electrical and mechanical parameters:

• Voltage Rating Match: Reverse standoff voltage of 220V and breakdown voltage minimum of 244V must be maintained
• Clamping Voltage: Maximum clamping voltage of 371.1V at peak pulse current
• Package Compatibility: P600 axial through-hole package for direct mechanical and electrical interchange
• Bidirectional Configuration: Single-channel zener diode topology
• Temperature Range: Operating range of -55°C to 175°C junction temperature
• Compliance Requirements: ROHS3 compliance for regulatory alignment

The 5KP220CA-B qualifies as a direct substitute based on identical voltage ratings, clamping voltage, package type, and operating temperature range. The primary distinction is enhanced current-handling capability (13.7A versus 8.1A) and increased power dissipation (5kW versus 3kW), which provides superior performance margin without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 5KP220CA-B is the appropriate substitute for the obsolete 3KP220CA-B. Both components maintain identical voltage specifications (220V reverse standoff, 244V breakdown minimum, 371.1V clamping maximum) and share the same P600 axial through-hole package, enabling direct mechanical and electrical interchange without circuit modification.

The 5KP220CA-B carries active product status, ensuring ongoing availability and supply chain support. Both parts maintain ROHS3 compliance, satisfying regulatory requirements for new designs and production environments. The enhanced current rating (13.7A versus 8.1A) and increased power dissipation capability (5kW versus 3kW) of the 5KP220CA-B provide additional performance margin and thermal headroom in the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the 5KP220CA-B be used as a direct replacement for the 3KP220CA-B?

A: Yes. Both components share identical voltage ratings (220V reverse standoff, 371.1V clamping), the same P600 axial through-hole package, and matching operating temperature ranges. No circuit modifications are required for substitution.

Q: What is the primary difference between these two parts?

A: The 5KP220CA-B provides higher peak pulse current handling (13.7A versus 8.1A) and greater power dissipation capability (5kW versus 3kW). These enhancements do not affect electrical compatibility but offer improved performance margin.

Q: Are both parts RoHS compliant?

A: Yes. Both the 3KP220CA-B and 5KP220CA-B are ROHS3 compliant, meeting regulatory requirements for electronic component manufacturing and use.

Q: Why is the 3KP220CA-B listed as obsolete?

A: The 3KP220CA-B has reached end-of-life status. The 5KP220CA-B remains in active production and serves as the recommended alternative for continued design support and supply availability.

Q: Will the substitute part fit the existing PCB layout?

A: Yes. Both components use the P600 axial package with identical pin spacing and through-hole mounting configuration, ensuring compatibility with existing printed circuit board designs without layout modifications.